Nine Insulate Britain protesters have been jailed or given suspended sentences following protests on the M25.
Lord Justice Dingemans and Mr Justice Johnson handed down sentences at a High Court hearing in London on Wednesday after National Highways took legal action against protesters.
They handed prison sentences of two months and 30 days to two protesters, while the seven others received two-month suspended jail terms.
National Highways claimed the protesters had breached an injunction and were in contempt of court.
Lord Justice Dingemans said each protester had accepted they had breached a court order and were in contempt.
The two judges heard Insulate Britain had organised protests which disrupted and obstructed the M25 on several days in September.
A judge had subsequently made an order barring protesters from staging protests on the M25.
Further protests had taken place in October, Lord Justice Dingemans and Mr Justice Johnson heard.
Protesters had made impassioned speeches seeking to justify forming human roadblocks.
The protesters, who have a combined age of 428, said they were compelled to act to highlight Britain's so-called "leaky homes".
One defendant, the Rev Sue Parfitt, 79, from Bristol, had said: "Wasn't it worth me sitting on the motorways to flag (our) message, and to interrupt people's lives for an hour or so, in order to protect our children?"
She was given a two-month suspended prison term.
