A banner reading ‘Our Amazon’ is suspended from a tree house built by environmental activists from HS2 Rebellion to try to prevent the destruction of trees in conjunction with the HS2 high-speed rail link in Denham Country Park on 13th July 2020 in Denham, United Kingdom. The HS2 project is currently projected to cost around £106bn and will remain a net contributor to CO2 emissions during its projected 120-year lifetime.