Where is the shade when the sun is overhead?

Balcony solar (balkonkraftwerk)—affordable, plug-in solar panels that can be installed without an electrician—has been adopted by over one million German households, particularly renters previously excluded from rooftop solar, following policy changes that simplified registration and made landlord approval mandatory.

With rising temperatures occurring all over the world, cities are implementing plans to combat heat waves and protect its residents. The city of Ahmedabad in India has been a model for heat resiliency after it created its first heat action plan that centered around “community-focused social measures.” Because of the plan, a 2015 heat wave resulted in fewer than 20 fatalities compared with thousands of deaths in previous years. Other cities like New York City are also participating in heat resiliency efforts aimed at protecting all of its residents.

WindowDressers mobilizes community volunteers to build low-cost insulating window inserts for older homes. Their efforts have saved nearly 4 million gallons of heating fuel, preventing 44,000 tons of CO2 emissions, and strengthening neighborhood ties while making heating more affordable—especially for low-income households who now represent nearly 40% of recipients.

SEEDS, an Indian NGO, collaborated with local Mising masons to redesign their traditional bamboo stilt houses with flood- and earthquake-resistant upgrades. This included concrete bases, chemically treated bamboo, and flexible joinery, which has resulted in longer-lasting dwellings, schools, and community shelters.

Volunteers of a nonprofit tree-planting initiative in Paris are planting pocket forests, based on Japanese botanist Akira Miyawaki’s method, to increase biodiversity and combat extreme heat. These mini-forests are made of native species planted close together at random to mimic a natural forest.

Activists in Los Angeles are taking legal action to ensure black walnut trees' protections are not violated by developers to help prevent gentrification and extreme heat.

Kenyans are trading iron for grass, palm fronds, and water reeds to build roofs that keep their homes cooler during extreme heat waves.

A housing project in Brooklyn is taking nine apartment buildings and retrofitting them to be more sustainable and cut carbon emissions. Casa Pasiva is a $20 million project that aims to reduce heating and cooling costs because of updated machinery and thick exteriors that will improve air quality. Funding for these types of initiatives is not always certain, but a collaboration between a developer and a nonprofit, with some city financing, made this first-of-a-kind green building renovation in New York possible.

In Paris, about 7,500 buildings are heated using geothermal energy, a cost-saving and carbon neutral energy source. Water is drawn from deep below ground at a central location and heated by the earth, and then sent via underground pipes to individual buildings. The Bagneux and Chatillon district has scaled up the system, providing heat to over 40,000 people. Districts created joint ventures to reduce construction costs and residents do not notice the energy source shift because when the temperature drops to a point where geothermal energy is not viable, gas boilers automatically keeps the heat flowing.

The Dutch government bought out and relocated 200 households in high-risk areas as a way to create more space for rising water levels instead of building bigger levees. The program is called Room for the River, and more than 60,000 people now have much lower flood risk. The program also built new roads, bridges, and pumping stations, one of which doubles as a wildlife-watching tower. This, along with the green spaces, bike paths, and plazas, is credited for building public approval for the project.