75% of the people that will drive into the clean air zone today would not be impacted at all. they are driving compliant vehicles. traffic is back to 90% of pre—pandemic levels in the city. it is hoped the clean air zone will mean it is never as bad as it was before. phil mackie, bbc news, birmingham. measuring the amount of squashed bugs on your car after a journey may be able to help scientists better understand insect populations in the uk. a new app is asking the public to gather the information to identify where certain species are thriving and where others are in decline. here's our chief environment correspondent, justin rowlatt. insect—ageddon is how the global decline in insect populations has been described by some scientists. one case study in germany suggested there had been a 75% decrease in numbers over 27 years. take the humble housefly. you may not like them,