Taking a conservative approach to clean energy

A collaborative effort among the United Nations' District Energy in Cities Initiative, the Malaysian government, and private partners has facilitated planning in Malaysia's rapidly developing southern state of Johor for a "District Energy System": a single heating and cooling network which decreases energy consumption by converting waste heat from large power stations. Because of this intervention, Iskandar is projected to decrease its energy use by almost 40% -- all while saving money on energy costs, recycling heat energy, and contributing to the nation's goals under the international Paris Accord.

Micro-hydro projects in the United States have become much more accessible and more financially viable since Congress passed a law in 2013 making it easier for small hydroelectric projects to get federal approval. Specifically, water treatment plants that can retrofit their systems to generate electricity are an excellent energy opportunity. The plant in Grand Lake now produces more electricity than it consumes.

Repurposing contaminated sites for clean energy production may not sound like a common tactic to take, but Massachusetts has found a way to be highly successful at it. In fact, out of over 250 renewable energy installations across the United States, Massachusetts accounts for 40 percent of them. The state attributes this success to a combination of an enhanced ease of the bureaucratic process and opportunities for revenue stimulation for towns.

Once a household name across the world for the disaster caused by the 2011 earthquake and nuclear disaster, Fukushima is on the path to revitalization. Locals in Fukushima are working to dispel any myths left behind in order to move the city and people forward through sustainable practices. Dubbed as "community power," these community members have taken significant steps to bring new energy options to the region.

An economic shift to renewable energy could take decades, but thanks to rapidly evolving disruptive technologies, dropping prices of solar and wind power sources, and increasing market demand for green business, the new age of renewable energy could encompass the world economy much more quickly.

Dams make for complex and often controversial infrastructure. While hydropower generated from large dam projects is currently providing the bulk of the planet's renewable energy, dams can also cause major environmental and social damage by interrupting animal migrations, displacing indigenous communities, and collecting toxins. A number of solutions are being implemented, however, to address the various issues caused by dams, to help make them a more eco-friendly and viable source of clean energy.

The Hydropower Empowerment Network takes a country-by-country approach to helping establish micro hydro and other technologies in rural places where electricity is difficult to come by. Micro hydro has even proven to be more durable and sustainable than solar, though solar is cheaper and quicker to install - the reason is the depth of community involvement required. When villagers participate on longer-term, complex projects, they develop pride in their work, learn invaluable new skills, and are empowered to engage with the solution.

Rahr Malting, a brewery in Shakopee, MN, has found a creative way to sustainably address their energy needs. The company partners with the Mdewakanton Sioux Community to use waste barley hulls from the malting factory to generate electricity for their facilities, selling excess power to the public grid while the waste heat sprouts the malt to make beer.

Since its commercial launch in 2012, M-Kopa has grown to exceed expectations for its revenue--now making more than $12 million a year. The company does this all while expanding access to affordable technology to the poorest rural population in Kenya, as well as providing them with credit and promoting green practices.

After a tornado devastated Greensburg, Kansas, the town decided to use the disaster as an opportunity to become more environmentally sustainable. For example, they built a new school out of recycled wood and it was powered with geothermal heat. While the maintenance of these sustainable features can be tricky, this shift to a greener town can be a case study for others looking to make the transition.