Another zero carbon caravan in 2018

I shall be promoting solutions to climate change by undertaking a zero carbon journey again in 2018, 25 years from the date I was hit by a truck travelling at 65mph while cycling home from work in 1993. 95% of people with my injuries would have died, but I was super fit as I used to commute 200 miles a week on a bike. I haven't yet decided whether I will cycle around Britain, or hitch a lift on a yacht across the North Sea (as I did when I cycled to the Copenhagen climate summit in 2009) and cycle to the climate summit in Poland