What tasks would we ask the G20 to do to halt freshwater biodiversity loss?

The UK’s Guardian Newspaper has launched a campaign to compile a list of 100 tasks that governments could undertake to prove their commitment to halting biodiversity loss.  It’s a nice idea – to provide a list of specifics so governments can’t hide behind generalities. The campaign will ask specific governments to sign up to specific projects. Given the importance of freshwater biodiversity it would be great to see 10 of the 100 tasks targeting freshwater systems – but what would they be?  What would be realistic, feasible and meaningful for a government to do?  Suggestions can be submitted (under a pseudonym if you prefer) on the Guardian Environment website. The closing date is the end of August.