The expression 'change overnight' means:

In 'Corporate climate targets would see an instant boost as business travel ground to a halt', the expression 'ground to a halt' means:

Match the expressions with the number they represent.

In '

The huge decline in travellers

in 2020 put

Match the following with the preposition they are typically associated with:

A 'knock-on reduction' is an indirect consequence.

The majority of the global population never flies.

Non-CO₂ emissions caused by aviation are estimated to have a worse impact on global warming than CO2 emissions caused by aviation.

This paragraph,

'But what would

happen if people across the world suddenly stopped flying completely? A

world of no flights would present some serious logistical challenges,

but could also open up the door to huge changes to other, lower-carbon

forms of transport. We are unlikely to ever cut out aviation completely,

and we likely wouldn't want to. But posing this hypothetical question

opens up the door to what we could be doing far more of to reduce

aviation's heavy impact on the climate.'

The following paragraph, 'Demand management – essentially people flying less – is the most effective way to reduce these emissions this decade, according to a recent report from Transport & Environment, an environmental non-profit organisation. Technologies such as sustainable aviation fuels, more efficient planes and electric aircraft will play a bigger role in the 2030s, it said.' suggests that the best thing to do right now is to reduce the amount of air travel.