Changes in the climate, such as global warming and an increase in UV radiation, have also been found to have a detrimental effect on frogs.

It's not linked to global warming or anything like that. This is normal climate variability.

Our focus is to understand how high-level clouds, cirrus clouds, impact the climate system. Global warming is the climate change we're the most worried about. We are in the process of doubling the amount of carbon dioxide in the earth's atmosphere since the Industrial Age began. The cause is the burning of fossil fuels, and it is significant because it is drastically changing the composition of the atmosphere.

This winter makes global warming seem more real.

The ocean is like this black box. We just don't know what's going on out there. Is it global warming? Is it pollution? Predators?

These studies each quantify, in a variety of ways, the risks we are already dealing with in the global warming that is clearly well under way.