Much has been made of the fact that human activity is causing global temperatures to rise.

The warm air mass was followed by a strong cold front, causing temperatures to fall below freezing.

Others, however, have used this evidence to suggest that CO2 may not cause increased temperatures.

He said a major cause of these cracks was the changes in temperature and humidity caused by the crowds.

Bugs are very sensitive to the slight change in temperature caused by the approach of a potential host.

The sky remains cloudy for part of the month, causing temperatures to decrease.

These usually only produce fog and light rain, with stronger ones causing freezing temperatures.

It could cause lower temperatures in northern North America.

This caused cooler temperatures and an increase in fog.

This caused temperatures to drop and the planet became very similar to its present-day condition.