Umair Irfan
Former correspondent
Latest articles by Umair Irfan
Extreme heat and extreme drought are combining to drive up fire risks. But blazes aren’t inevitable.
The biotech firm said its Covid-19 vaccine showed 90 percent efficacy in clinical trials. Thank moths.
We may never know for sure if the virus that causes Covid-19 leaked from a lab. But that won’t stop the debate.
To truly change the game and reach the mass market, electric vehicles need to be much cheaper.
The rise of noctilucent clouds may be yet another unforeseen consequence of burning fossil fuels.
Why clouds are one of the greatest sources of uncertainty for climate change.
A new IHME analysis finds 6.9 million deaths worldwide, and suggests countries have been undercounting since the beginning of the pandemic.
How coronavirus variants are affecting vaccines, treatments, and our attempts to return to normal.
Countries can’t go it alone in tackling Covid-19.
The CDC and FDA on Friday accepted recommendations that Johnson & Johnson Covid-19 vaccinations should resume, but with a warning.