Fighting against lignite coal-mining in North Rhine-Westphalia/Germany.
Living and travelling for one month with reindeer-nomads through the Russian Arctic.
Five summers horse-trekking over thousands of kilometers through the wildest regions of the Tien Shan Range.
Roaming for two winters through the remotest valleys of the Kyrgyz highlands in extreme temperatures.
A month alone on the icy northern roads of Sweden and Norway beyond the polar circle.