The Great Barrier Reef off the Queensland coast of Australia is home to a wealth of marine life. The reef is home to 400 types of coral and 1,500 species of fish.
The cleanliness of natural gas is largely based on its lower carbon dioxide emissions when burned.
Shale gas extraction could come up emitting greenhouse gases to the atmosphere in two scenarios, one is when gas is burned and it produces carbon dioxide, second is when methane gas leaks out while the well is being tapped.
The European Union in 2007, has committed to reduce greenhouse gas emissions by 20 percent below the 1990 levels by year 2020, producing of its electricity from renewable energy sources.