The world’s largest cooling project?

New research suggests that refreezing the Earth’s poles by reducing incoming sunlight would be a feasible and cheap approach to addressing melting ice and rising sea levels. In what might be the world’s largest cooling effort, scientists proposed spraying microscopic aerosol particles into the atmosphere above the poles via high-flying jets. According to new research […]

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‘Watching brief’ on airborne COVID-19

The World Health Organization (WHO) has acknowledged growing concerns surrounding the airborne transmission of the coronavirus, following the publication of an open letter addressed to the Geneva-based agency, but says more evidence is still required. Since the beginning of the pandemic, the organisation has advised that the virus is primarily spread through large respiratory droplets […]


Opinion: Can HVAC systems spread COVID-19?

By Craig Roussac, M.AIRAH. All buildings are created for people, and building owners must ensure they are safe. But unfortunately, as with most things in life, there is no guidebook setting out the “ideal” way to achieve that outcome. This is especially true in a pandemic. Over recent days, research has been published in the journal Nature that […]