The tiny pieces of soot that come from our vehicle engines are bad for our lungs, especially if there is a lot in the air
Carbon Dioxide, or CO2, comes out of our vehicle exhausts when the engine is running. It builds up in the atmosphere, trapping heat and contributing to climate change
The US Environmental Protection Agency describes different levels of PM2.5 in the air like this:
Weather conditions, especially wind, can make a big difference to the amount of particulates in the atmosphere. A strong wind from the West brings clean air in from the Atlantic to the UK. Wind from the East can blow pollution in from cities in Europe, adding to the pollution from our own cities.
The Cambridge Climate Change Charter gives everyone the opportunity to find out more about their carbon emissions and how to reduce them, and to make a pledge to take action