"But Australia's Resources Minister Gary Gray said while it was important to invest in clean energy technologies, coal was vital to the economy.
"There is no solution to global baseload energy generation that does not figure a big contribution by coal," he told the ABC.
The minister said developing countries such as India and China were reliant on Australian coal for energy.
"We do have to accept that in a growing region there are still countries that need these resources in order to draw hundreds of millions of people out of poverty," he said.
Coal is Australia's largest energy export earner, with a value of around Aus$48 billion (US$46 billion) in the 2011-12 fiscal year, followed by crude oil and liquefied natural gas."