How Nature can help remove the strange things that man adds to water:

http://www.resilience.org/stories/2015-03-17/designing-wetlands-to-remove-drugs-and-chemical-pollutants

The importance of Wetlands to Drinking water supply

Water as a source of city heat

River Heatmap: showing where heat pumps could make a useful contribution

There are two shining examples of this technology in practice in the UK: a 2MW installation at Kingston Heights on the River Thames in London and a 300kW one at Plas Newydd on the Menai Straits in north Wales.

Biodiversity and corporate sustainability

http://asmarterplanet.com/blog/2014/06/biodiversity-next-step-sustainability.html#more-30912

In terms of innovation and opportunity, businesses have invented a number of ways to use biodiversity to create value. These are just a few of the more popular ideas:

• Market biodiversity and its protection as a key value proposition to customers
• Leverage cross-sector partnerships to promote transparency
• Look to big data to support decision-making
• Utilize natural processes to replace cost-side efforts
• Build new products inspired by or directly using biodiversity and biomimicry
• Account for biodiversity as a revenue-generating asset

Read more here:

New Sensors

https://www.kickstarter.com/projects/edyn/edyn-welcome-to-the-connected-garden

People for Smarter Cities, water examples

http://people4smartercities.com/series/big-buy-how-city-and-its-citizens-got-smart-about-water

How models help understand climate change

https://www.ted.com/talks/gavin_schmidt_the_emergent_patterns_of_climate_change

Surveying sewers with little risk

I could see this surveying sewer systems in minutes without getting wet:

The video is worth seeing to understand its agility and accuracy

http://www.ted.com/talks/raffaello_d_andrea_the_astounding_athletic_power_of_quadcopters