How bad are asthma inhalers for the environment?

BBC journalist David Gregory-Kumar has had asthma since he was a child.

In a bid to cut his carbon footprint, he's looking at greener alternatives to the regular metered-dose inhaler.

Propellant gases in such inhalers account for nearly 4% of NHS greenhouse gas emissions, according to experts.

BBC News follows Midlands Today's Science, Environment & Rural Affairs Correspondent on his morning nursery run and annual asthma check up.

Switching to a different type of inhaler can be complicated for people with asthma, as it involves learning a new inhaler technique, so it should be done with support from a GP or asthma nurse only, Asthma UK says.