Isn’t the recent warming due to the growth of our towns and cities?
No. The climate is warming everywhere because of CO2 emissions. Temperatures in cities are unnaturally high because of the warmth from heating homes and offices, heavy traffic, high concentrations of people and heat stored in buildings and concrete. Our observations come from urban and rural areas on land and from the sea, which covers 70% of the Earth. We manage data from cities carefully to ensure they do not skew our understanding of climate change.
