Extinction Rebellion protesters are planning to blockade the Port of Dover this weekend blocking two major roads out of the port for up to four hours.
The climate change group said it will take place on Saturday, and the port are working closely with the police to minimise disruption.
Chris Atkins from Extinction Rebellion Dover said: “As climate change develops, millions of ordinary Britons will face the real and growing threat of food shortages, hunger and starvation.
“Extreme storms and floods are already causing major crop failures across the world, with high temperatures also hitting livestock agriculture.
“This crisis may seem far away now but given the dependency of the UK on food imports we are extremely vulnerable.
“The Government must tell the truth and act now.”
He added, “Extinction Rebellion appreciates the blockade will directly affect ordinary people and businesses, but we feel the action is necessary in order to call the Government to action.”
The Port of Dover is one of the busiest ports in Europe as it has almost 5m vehicles and around 12m passenger that pass through every year.
A spokesman for the Port of Dover said, “We are aware of the protest plans and as a result, Port of Dover Police are working closely with Kent Police to ensure as minimal disruption as possible.”
