Global warming affects animals by changing their habitats and food sources. As climates warm, some species are unable to adapt and their populations decline. Polar bears and phytoplankton are negatively impacted as they rely on environments threatened by climate change. However, some animals like great tits and red squirrels can adapt by altering behaviors like earlier breeding times that enable survival. While global warming makes life difficult for many species, small actions by individuals can help reduce the rate of climate change.