The world's most polluted capital city

Laws in Texas and New Mexico, both locked in the grip of a crippling drought, don't do much to actually encourage citizens to conserve water. New conservation laws and financial incentives are trying to change that.

Soil in Bangladesh is becoming increasingly saline and infertile due to climate change. Bangladeshi farmers have begun using a saline-tolerant rice seed in order to produce an abundant crop despite salty soil.

Amidst a world struggling with smart ways to confront climate change, Hawaii's 2050 Plan for sustainability is working to be a model for the rest of the world. So far, it is on it's way to being a leader in solar energy, with Honolulu having the most "solar panels per capita than any other North American city," and the state is working to produce more food locally, as well.

The lack of access to healthy food has always been a problem for the financially unstable. Food stamps can now be used to buy fresh produce at farmers markets, but greater success could be achieved by getting grocery stores involved.

It’s no secret that, although progress has been made, school lunches need help to become more nutritious and sustainable. School officials in San Francisco are partnering with researchers from UC Berkeley's School of Public Health to better school lunch programs and, ultimately, curb child obesity.

Concerned with colony collapse syndrome in honey bees worldwide, scientists, farmers and tech companies teamed up in Australia to create a micro-sensor that collects data on the bee's environment.

Farmers in Vietnam face rising sea levels but rejected the city's water engineering projects. They prefer gradual measures to cope with climate change so scientists have allowed the farmers to steer the conversation.

Ecological toilets that use natural composting to break down waste are simple to construct, waterless and are easy to fix. But as philanthropists are finding, getting these to those that need it most is harder than anticipated.

The Green Revolution in Asia and Latin America never spread to Africa, due to the continent's varied climate, degraded soil and lack of infrastructure. Now, scientists look to develop a high grossing wheat seed to bring a new green revolution to Africa. The seeds are extremely promising, but there are still some challenges to getting farmers to implement the seeds.

After a devastating cyclone changed the nature of local soil, NGOs preserved Indian rice crops by reintroducing traditional rice varieties that can be cultivated even in salt-ridden earth. Although some first met this idea with skepticism, many farmers have now adopted the practice after witnessing the success of the crops.