wat. The English discovered Australia and founded it. Later they let the ingrates that live there, have it. So England gave the world Australia. The Australians then ruined it.
Australia didn't become independent from England until 1900, by which time most of the damage had already been done. It didn't take more than a few years for Sydney Cove to go from a beautiful bay that the colonists decided to found the first city on to a sewage dump. The atrocities committed to the land and to the native inhabitants over the next century were also committed by English colonists.
It only took a couple of decades after independence for Australians to start making changes for the better. We gave women the right to vote, and eventually started treating Aborigines as human beings. We have programmes in place to try to reduce the amount of waste that gets dumped into landfill and waterways. Now our Prime Minister has even allowed a conscience vote for her party in Parliament on the issue of gay marriage, despite not herself being a supporter of it.
We haven't fully repaired the damage you did to our nation before independence, but we're working on it. These things take time.