In the wake of Slovakia's 3rd annual Zero Waste Conference, which took place online in September, Jonathan speaks with Alexander Ač - a specialist in climate change at the Czech Academy of Science's Institute for Global Change Research, who spoke at the conference - about why C02 is now regarded by many climate scientists as a kind of waste product, even though it occurs naturally and abundantly in the Earth's environment. The first of a two-part interview. Then, Martina sets off down an empty highway on the first day of Slovakia’s “mild lockdown”, so as not to miss the date by which trees must be bought in Slovakia in order to successfully plant them before winter.