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rest come from things like deforestation, livestock production, and industrial pollutants.

much is due to economic growth and the rising use of coal in places like China.

population growth

Combining all anthropogenic climate forcings—including greenhouse gases, land use changes, and sunlight-reflecting aerosol particles—gives a net result equal to a CO2 concentration of around 430 parts-per-million

it must come back down to 450 parts-per-million by the end of the century

it’s clear that low-carbon options like renewables, nuclear energy, and fossil fuels with carbon capture will need to account for more than three-quarters of all electrical generation by 2050 if we’re going to meet that two degree Celsius target

Despite strong urban growth in many places, energy use in buildings could level off or decrease by the middle of this century if the right choices are made in terms of efficiency

long-lasting infrastructure we put in place now can determine, to a large degree, how much energy residents of a city will need to use

And while we’ve made some progress on deforestation, there’s potential there as well—forests and agricultural lands could be pulling CO2 out of the atmosphere, rather than releasing more, by the end of the century