Think weeds are trivial? Think again.

Weeds cost Australia at least $4b per year.

That's much more than the cost of salinity.
And it's roughly equivalent to the annual cost of illicit drugs to Australian business or the yearly value of our gold exports.

The Weeds CRC has compiled images of some of the worst weed infestations in Australia. These dramatic images show that the weed problem can become much bigger than your backyard.

Enter image gallery