Capturing CO2 to recycle it, brightening clouds to better intercept sunlight, massive reforestation: here's an overview of scientific solutions to combat global warming that offer a glimmer of hope.
2007
2017
1989
1999
1994
1998
2001
2002
2015
2024
1973
1993
2008
1977
1991
1939
2021
2014