Pollution, both indoor and outdoor, is a massive public health issue for our time. Much of it is due to inefficient, poorly used, and badly distributed energy technologies.

Improving access to modern energy that emits less pollution, both in the home and the community, can benefit the health of millions of people today and improve long-term health by reducing climate change.

Energy is also a critical enabler for vital health care services – electricity is needed for basic lighting, access to clean water, equipment sterilization, and to power other essential equipment.

Many of Ashden's Award winners are working on global solutions such as cleverly designed cleaner cookstoves which emit less smoke, sustainable transport initiatives that are contributing to reductions in traffic-related health risks from air and noise pollution, and solar- powered fridges that are playing a crucial role in vaccine distribution.

It’s clear we need to speed up our efforts so I’m calling on the government to match my new level of ambition for London and to work with me to improve our city’s dirty air and to make sure we get within legal limits much sooner - before the current target of 2025.

Sadiq Khan, Mayor of London

At a household level, tackling energy inefficiency in damp cold homes not only saves on energy bills but also has a positive direct impact on public health and fewer premature winter deaths. Reductions in bills can also lead to less stress and better mental health for occupants. In the UK both Cosy Homes in Lancashire and the London Borough of Islington’s Seasonal Health Intervention Network are helping vulnerable residents to tackle fuel poverty.