This Canadian First Nations group wants you to buy salmon raised on land

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.

Louisiana and Vietnam both need affordable solutions to rising sea levels. Leaders from Vietnam visited Louisiana to compare ideas.

To decrease the nation's food waste, activists in Denmark showed the people that it was safe to buy and consume items that were very recently expired. From live demonstrations where celebrity chef features expired items in the entrees to reducing prices for out-of-date items, "Danes now throw away 25 percent less food than they did five years ago."

The World Conservation Union estimates that 40 percent of the more than 40,000 species it tracks on its Red List are close to extinction and this problem requires humans to change their behavior to fix it. Rare’s the Pride Campaign uses social marketing to attract attention and communicate the conservation message between local communities and government entities. The Pride Campaign has been replicated around the world for different conservation efforts to protect biodiversity.

Organizations in Detroit are piloting a program to apply food stamp credits in grocery stores towards the purchase of nutritious produce, in order to increase access to healthy items. The initiative can also help the local economy prosper through increased promotion of locally grown produce.

In just the next couple of decades, the World Bank says, farmers across Africa could lose more than half their cropland to drought and heat - the issue is considered so pressing that, a few years ago, Malawi's Department of Meteorological Services added "Climate Change" to its name. A new aid group group now works with farmers in more than 60 villages — with plans to expand — helping them become more resilient to a changing climate.

New water management technology implemented along the Columbia has significantly helped the fish population - specifically salmon - return to healthy numbers and has restored much of the community and industry that revolves around the river, including for native peoples.

In an agricultural system designed for big-industrial growers, many farmers struggle to bridge the relationship between their produce and consumers, as well as strengthening local economies. The food hub is a collection of buildings that process and distribute the sale of local food. Eastern Market in Detroit is an example of a food hub that makes local produce accessible to low-income neighborhoods.

The 'food desert' term is a hot buzzword that suggests lack of access. Research on obesity and food availability in poor areas suggests that access must be considered, but only alongside additional factors like price, taste and education.

Clean water and healthy ecosystems are becoming increasingly difficult to come by. With floating islands and other inventions, eco-entrepreneur Bruce Kania thinks that biomimicry - such as reconstructing wetlands and growing biofilms - can tackle the toughest of water problems.