There are currently about 32 million trees alongside Britain’s trunk roads and motorways; this January plans were announced to plant 50 million trees to create a "Northern Forest" over the next 25 years along a 120-mile stretch of the M62 backed by £6 million from the Government; the attached image depicts the M27 that has been running for the last 40 years along the edge of the New Forest.
More than a quarter of recent anthropogenic CO2 emissions are absorbed by forests. This is primarily attributed to enhanced plant growth as a result of elevated atmospheric carbon dioxide concentration (eCO2).
Anthropogenic climate change is expected to lead to substantial increase in extreme precipitation with impact on flooding. However, simulating precipitation and how it may change in the future is still a major challenge, and associated with large uncertainties.