Fossil aren't the only cause of global warming. Many human activities are causing global warming. Most come from the combustion of fossil fuels in cars, factories and electricity production.
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Maps help local governments become more democratic by giving local governments are more precise spatial knowledge of the regions that they govern.
This also applies for national or federal governments. Maps are an increasingly important source of information for government at all levels, because they are a great tool to place all kinds of information about a region: demographic information, economic information, physical geography information, and so on.
To be basic, it harnesses the greenery. So it prevents the greenhouse emissions from harming any greenfields from becoming brownfields