Latest Susan Solomon Stories
Even after many decades of studying ozone and its loss from our atmosphere miles above the Earth, plenty of mysteries and surprises remain, including an unexpected loss of ozone over the Arctic this past winter.
Experts say the hole in the ozone is expected to be smaller in 2009 than it was a year ago.
Researchers declared Monday that many damaging effects of climate change are already irreversible, warning that even if carbon emissions can somehow be halted temperatures around the globe will remain high until at least the year 3000.
A top scientist in the study of climate change says she is optimistic about public understanding of the dangers of global warming.
Human-caused global warming is here - visible in the air, water and melting ice - and is destined to get much worse in the future, an authoritative global scientific report will warn next week.