This book is a framework - not only how to stop global warming, but how to reduce carbon levels in the face of population growth and quality of life increases. The author and research team synthesized primary research from thousands of studies and developed a ranked list of the most important actions the globe can take to combat climate change. (I’ve included a one-sentence summary of each solution in this review. The book goes into far more depth about the logic behind the rankings, how each solution works, how much carbon it saves, various pros and cons, and the required financial investment.)
A key plus for many of these solutions is they offer benefits beyond carbon sequestration. In addition to reducing sequestering carbon, the majority offer financial savings, increase industrial yields or efficiency, create jobs, and result in healthier people. There are reasons to act on these beyond saving our environment.
The strength of this framework stems from interdependence. One solution’s weaknesses are balanced by the strengths of another. It’s a symbiotic ecosystem of recommendations – a permaculture, not a monoculture, of ideas.
I do worry that a book like this gives a false sense of optimism. Implementing these policies will take incredible investments, coordination between governments, and massive behavior changes on the part of the individual. Yes, there are personal steps one can take after reading this book, but they aren’t steps anyone who pays attention to ‘green’ issues won’t have heard of before. I’m talking behavior changes on the scale of convincing entire populations to sustain massive tax increases to pay for the infrastructure you’ll need; behavior changes to convince millions of people around the globe to change habits fundamental to their life and culture. Each individual solution will require innumerable persons across the globe dedicating their lives to implementing the chosen recommendation.
This is a brilliant framework for addressing climate change. It is the product of years of synthesizing research on a mass scale, of running the mathematical calculations we needed to chart a way forward. It is the starting point for a real “how-to” guide for policy makers. It is work no one else has done until this point. But don’t read it and think, “oh, we’ll be fine! Technology will save us!” Read it and go start advocating for mass public transit. Go vegetarian. Start blathering to everyone you know. Find international organizations working on these issues and start donating all you can. Take the extra 45 minutes to walk to work. Go to city council meetings and say, yes, we’re willing to have wind turbines in our back yard. This is a framework, but it isn’t a framework to an easy way forward. It’s a framework for hard, hard work.
Thank goodness. Hard work is what we’re going to need.
1. Refrigerant Management: The HFCs found in refrigerators and AC have a 1000 to 9000 times higher capacity to warm the environment than carbon dioxide, and 90% of those emissions come when improperly disposed; substituting in better materials, combined with proper disposals could cool the earth by up to 1 degree Fahrenheit.
2. Wind Turbines: Estimated to be the world’s cheapest energy source by 2030, wind has the potential to cleanly meet nearly all the world’s energy needs.
3. Reduced Food Waste: By reducing food waste – through tightening supply chain logistics in low-income countries and changing consumer habits in high-income countries – resources are saved across the food chain, from fertilizers to transport to energy needed to keep perishables cool.
4. Plant-Rich Diet: Reducing meat consumption lowers methane emissions from cattle, reduces land use and the need to deforest additional land, eliminates fossil-fuel heavy value streams for stock feed, lowers demand for water, and increases the health of populations.
5. Tropical Forests: Restore degraded tropical forests to make carbon sinks, protect watersheds, and offer more resilient livelihood opportunities.
6. Educating Girls: Giving women access to education increases family planning, resilience to climate change, and offers one of the most cost competitive climate solutions, estimated at only $10 per ton of carbon dioxide reduction.
7. Investment in Family Planning: Increase women’s autonomy to decide when and how many children they wish to have reduces the number of births, subsequently reducing global resource demand.
8. Solar Farms: Build massive solar farms that operate on the scale of entire utilities systems.
9. Silvopasture: Combine trees with cattle pasture to sequester carbon in both soil and woody growth, while increasing yields and bolstering both the cattle and the land’s resilience to climate change.
10. Rooftop Solar: Install solar panels on buildings, allowing them to generate their own power.
11. Regenerative Agriculture: Utilize regenerative agricultural practices (no-till, planting cover crops, removing external nutrient inputs) to heal soil, sequester carbon, increase nutrient and water retention for drought resistance, and increase production.
12. Temperate Forests: 1.4 billion of acres of land could be restored to temperature forest, adding even more of an ecosystem that already acts as a carbon sink.
13. Peatlands: Conserve peatlands – while they make up only 3% of the earth, only oceans store more carbon.
14. Tropical Staple Trees: Shift more land to growing perennial food products (and diets to eating them), which have higher carbon sequestration rates and are more resilient to extreme weather. (This solution is currently only viable in tropical regions.)
15. Afforestation: Use afforestation – planting trees where none have grown for at least 50 years – to create new carbon sinks, particularly in degraded areas.
16. Conservation Agriculture: Similar to regenerative agriculture, but allowing use of fertilizers and pesticides, this solution has many of the same benefits on a slightly lesser scale but is simpler to rapidly adopt and may be easier to use on mass-produced annual crops.
17. Tree Intercropping: Intercrop agricultural products with compatible trees or bushes, improving soil health, sequestering carbon, reducing the need for inputs, increasing outputs, and creating resilience to drought and wind.
18. Geothermal: Harness naturally-occurring geothermal energy for power.
19. Managed Grazing: Managed grazing – shifting cattle’s grazing patterns to consider the health of the pastureland – results in improved grasses and a healthier ecosystem, improves cattle health, and allows the soil to sequester more carbon.
20. Nuclear: Continue utilizing – indeed, expand – nuclear power to replace coal. (Note: The authors acknowledge the significant controversy surrounding this power source - both safety and whether it’s truly cost effective.)
21. Clean Cookstoves: Forty percent of the world cooks on stoves which use fuels that release black carbon (although short-lived, it absorbs a million times more energy than CO2), meaning switching to stoves that use cleaner fuel rapidly slows warming (in addition to improving health).
22. See Wind Turbines (#2) – offshore turbines are #22
23. Farmland Restoration: Exhausted and thus abandoned farmland emits carbon, but if restored through regenerative farming practices or cultivation of native species, it actively removes carbon from the air and pulls it back into the soil while increasing land available for agriculture.
24. Improved Rice Cultivation: Adoption of an alternative method of rice production reduces methane emissions, sequesters carbon, reduces input requirements, results in more resilient plants, and increases rice yield per acre.
25. Concentrated Solar: Use mirrors to further concentrate light in already intensely-sunny areas to produce steam, which is cheaper to transmit than electricity and can be stored for high-use times.
26. Electric Vehicles: Switch from fossil fuel powered engines to electric vehicles (for both personal transportation and shipping fleets) that run off energy generated by renewables, a task likely to made easier by an oncoming wave of battery innovation.
27. District Heating: Already well established in Europe, district heating manages heating and cool needs not at the structure level but the district level, using centralized coordination for maximum efficiency.
28. Multistrata Agroforestry: By mimicking the natural layout of the “strata” of a jungle canopy, multistrata agroforestry sequesters huge amounts of carbon while generating multiple valuable agricultural commodities with minimal inputs, even when using land already severely degraded.
29. Wave and Tidal: While still posing technical challenges, waves and tides can be harnessed for energy.
30. Methane Digesters: Use methane digesters to capture the methane emissions from organic waste (agricultural, food waste, and excrement) and use it for fuel, while also reducing the harmful emissions.
31. Insulation: Insulating buildings well would keep them cool in the summer and warm in the winter and stop energy loss – currently, most structures lose over 50% of their energy to poor insulation.
32. Ships: Over 80% of global trade happens by sea, leading to huge carbon savings by improving fuel efficiency of ships.
33. LED Lighting: Switch to LED lights, which use 90% less energy yet produce the same light as a standard bulb – in addition to lasting for years longer.
34. Biomass: Harness biomass as a “bridge” solution to provide energy as society shifts away from fossil fuels to truly renewable sources of energy.
35. Bamboo: Cultivate bamboo, which thrives on degraded lands, has economic uses, and sequesters carbon faster than nearly any other plant.
36. Alternative Cement: By mass, cement is the second-most used substance in the world, and manufacturing one ton of produces at much carbon as burning 400 pounds of coal; changing this process to incorporate waste byproducts from other industrial processes could reduce carbon emissions.
37. Mass Transit: Mass transit usage is expected to decline rather than grow as global wealth increases and more people purchase personal vehicles, but ridership habits could be strengthened by utilizing strong design principles and interconnectivity of public transit systems, potentially preventing 6.6 tons of CO2 emissions from cars.
38. Forest Protection: Forest conservation offers a range of environmental and livelihood benefits, and while deforestation is estimated to produce 10-15% of the world’s carbon emissions, stopping deforestation could offset 33% of emissions.
39. Indigenous Peoples’ Land Management: Indigenous people often find themselves on the front lines of environmental battles and managing natural resources in a way that benefits all, yet experience the highest impacts of climate change; as such, it’s crucial to secure their tenure on their own land.
40. Trucks: Major efficiency improvements in truck fleets are needed as incomes, and thus ground freight, continues to increase – already consuming 25% of the fuel in the U.S., trucks are currently responsible for about 6% of all global emissions.
41. Solar Water: Store residential water in tanks heated by the sun, eliminating the need to use fossil fuels to heat water.
42. Heat Pumps: Replace the world’s massively energy-guzzling AC and heating systems with already existing heat pump technology.
43. Airplanes: With air traffic on the rise and airplanes a major carbon emitter, emerging efficiencies in plane design and fuels, as well as regulations around fuel efficiency, are crucial to reducing flight CO2.
44. LED Commercial Lighting: See #33 – similar principles, but for commercial structures.
45. Building Automation: Building automation systems use sensors to automatically control a wide range of building factors, from air circulation to heat to identifying early maintenance problems, offering a host of efficiency savings.
46. Water Saving – Home: A tight link between water and energy means lowering personal home water usage can save energy and relax pressure on local water sources (and saving energy at home reduces water used by the local power plant).
47. Bioplastic: If the entire lifecycle of a bioplastic is considered (when not recycled properly, or land is cleared to grow their source materials, they produce their own problems), bioplastics could replace current petro-plastic that relies on cheap fossil fuels for production.
48. In-Stream Hydro: Place in-stream turbines into rivers to create energy – these free-standing structures create energy without flooding land for reservoirs and have only minimal impacts on wildlife.
49. Cars: Increase the number of electric and hybrid vehicles – while their power sources get far better mileage, 97% of the world’s car still contain only the standard internal combustion engine.
50. Cogeneration: Many energy processes are inefficient and create waste in the form of heat; use cogeneration to capture the excess and harness as a heating source.
51. Perennial Biomass: Use perennial, rather than annual crops such as corn, to produce bioenergy.
52. Coastal Wetlands: Wetlands sequester enormous amounts of carbon – destroying them allows carbon to escape, but through preservation and restoration, they actively capture emissions.
53. See Improved Rice Cultivation, #24 – drops to #53 if a slightly less efficient, but technically simpler, version is used.
54. Walkable Cities: Design cities to encourage walking instead of driving, considering not only distance but pedestrian safety and aesthetic appeal of the route.
55. Household Recycling: Recycling reduces the need for further resource extraction while simultaneously reducing the negative impacts of landfills, in addition to providing economic benefits and job opportunities stemming from value streams created by upcycling.
56. Industrial Recycling: The same effects as household recycling, extended to the industrial sector; for industry, this includes the additional step of planning ahead for disposal of their product, rather than letting the costs of this question be borne by the public.
57. Smart Thermostats: Smart thermostats learn the heating preferences of occupants and automatically adjust temperature as necessary, keeping costs and energy use down and livability high.
58. Landfill Methane: Capture methane emissions produced by landfills to use as a clean fuel source.
59. Bike Infrastructure: Increase trips taken by bike rather than car using a broad array of investments and design tools to support ridership.
60. Composting: When biodegradable waste – think food and lawn scraps – degrades in landfills in the absence of oxygen, it produces methane; diverting this waste for compost injects nutrients back into the soil, sequestering carbon and offering rich natural fertilizers.
61. Smart Glass: Smart glass can change its tint in response to environmental factors and adjust the amount of heat and light it lets into the building, reducing a structure’s energy needs by up to 30%.
62. Women Smallholders: Giving women in the agricultural workforce equal access to land and financial resources would lead to increased food outputs, reducing the need to clear additional lands of forests to meet growing global nutritional needs.
63. Telepresence: Utilize rapidly-improving telepresence technology for business and collaboration needs, drastically cutting down on travel.
64.See methane digesters, #30 – rank drops to #64 if only small digesters are used
65. Nutrient Management: Runoff and overuse of agricultural nitrogen and fertilizers causes a host of environmental problems; improving proper management of application that reduce (although not sequester) carbon emissions as well as save farmers money.
66. High-Speed Rail: Build high-speed rail to support mass public transit for regional distances, while freeing up conventional rail for freight traffic.
67. Farmland Irrigation: Switch to sprinkler or drip irrigation, instead of “flood” irrigation, saving both water and energy.
68. Waste to Energy: Like biogas, this is a “bridge” solution – incinerate waste to make energy (and reduce methane landfill emissions) while shifting to permanent renewable energy sources. (Note: The authors list significant concerns with this solution.)
69. Electric Bikes: Use electric bikes to bridge transportation gaps that are too far to walk but may be too short to financially justify public transit – journeys that people currently take via higher-emission cars.
70. Recycled Paper: Recycled paper products require less energy and less water than virgin paper, reduces deforestation, and provides more jobs than landfill or incineration; overall, recycled paper has a mere 1% of the impact of virgin paper.
71. Water Distribution: A huge cost of water is the energy required to pump it where it needs to go; a systematic and widespread effort to reduce the huge amount lost through leaking infrastructure reduces energy and saves water for millions of additional people.
72. Biochar: Biochar is produced by baking biomass in near total lack of oxygen (think purely organic waste burning under soil), leading to incredibly carbon-rich soils; this evolving technology can be practiced on both individual and industrial scale to recycle waste, sequester carbon, and greatly improve soil health.
73. Green Roofs: Cities – measurably hotter than surrounding areas – can lower temperatures by installing green roofs on buildings, which lower a site’s energy needs as well as contribute to a more pleasant urban environment with cleaner air.
74. Trains: Trains – hugely efficient at transporting freight – could be even more efficient: switch to electric trains powered by renewables, increase carrying capacity, and use more aerodynamic designs.
75. Ridehsaring: Vastly underutilized in the U.S. and Canada, ridesharing reduces emissions and pressure on infrastructure, saves commuters money, and can be facilitated with increasing ease as data facilitation between platforms becomes increasingly common.
76. Micro Wind: Install smaller-scale wind turbines to charge batteries or power individual homes where larger wind farms aren’t feasible.
77. Grid Flexibility/Energy Storage: Develop highly flexible energy grids that can respond to changing usage requirements and energy sources throughout the day (i.e. a peak source at 4 p.m. might drop to nothing at 7 p.m.).
78. Microgrids: Most of the electrical networks are organized in massive “macrogrids” that draw on fossil fuels; reorganize into smaller, more resilient ‘microgrids,” allowing structures to tap into a diversity of smaller, renewable energy sources.
79. Net Zero Buildings: Design all buildings to be net-zero energy; that is, producing as much energy as they use.
80. Retrofitting: Retrofit already-existing buildings with new green technologies like better lighting, appliances, and window insulation offer high energy savings.