Four climate activists on hunger strike have pledged to continue going without food for a second week as they call on political leaders to act on the environmental crisis. More than 520 people in 28 countries, from Barcelona to Stockholm, joined Extinction Rebellion’s global hunger strike a week ago. Most of them - including at least 260 in the UK - signed up to go without food for seven days, but four of those in London say they intend to continue. In the UK, protesters camped outside the headquarters of the main political parties, including 83-year-old Ursula Pethick. **SNIP** After...