Edexcel (9-1) Topic 8

In the modern day atmosphere, oxygen takes up about 21%. What is the approximate percentage of nitrogen?

%

During complete combustion of butane, what are the chemical products?

water and

Sulfur dioxide gas produced by the combustion of fossil fuels is generally responsible for producing ?

Rising temperatures due to the increase of and methane in the atmosphere will lead to:
ice at the South Pole and in glaciers will melt, causing global sea levels to - this will lead to increased, and/or permanent in some areas
animals will move away from their 'natural' habitats to find areas to live, and some plants/animals may become if they cannot survive the warmer temperatures
weather patterns will begin to change with some areas becoming , and others much wetter - and even more extreme weather events like more frequent severe and heat waves/droughts
wildlife, and growth of , will be affected by the ever-changing weather systems
as more carbon dioxide is released, more will into water systems lowering the - more acidic waters can harm the organisms that live in them