The passage describes human impacts on ecosystems and air pollution.
Complete the passage by writing a suitable word or words on each dotted line.
Plants reduce the level of the greenhouse gas ................................................................ in the atmosphere by the process of ................................................................ .
The burning of ................................................................ fuels releases this gas, along with the pollutant gas sulfur ................................................................ , which dissolves in rainwater to form ................................................................ rain. This can destroy the place where a species lives, known as its ................................................................ .
Another greenhouse gas is ................................................................ , which is released from the digestive system of cattle. These gases increase the ................................................................ effect and lead to ................................................................ warming.
Incomplete combustion also produces the toxic gas carbon ................................................................ , which binds to haemoglobin in red blood cells.
