A:water pollution in the river Thames
FYI: This occurred in London, in July and August
Explanation:
The conference was held near Yalta in Crimea, Soviet Union, within the Livadia, Yusupov, and Vorontsov Palaces. The aim of the conference was to shape a postwar peace that represented not only a collective security order but also a plan to give self-determination to the liberated peoples of Europe.
Answer: so-called "Scramble for Africa" or "Conquest of Africa" or "Partition of Africa" was an extension of imperialist rivalry between European super-powers of that time who viewed European and world politics increasingly from the Darwinian perspective.
Explanation: Intellectual look at the map in the 19th century was very Darwinian (or vulgarly Darwinian) and divided peoples of the world into "superior" people and "inferior" people. Jews were European blacks - the most inferior Europeans, then there were blacks, American indians, Asians. This vision of the world and history prompted European imperialism ...1881 is the year when starts so-called "New Imperialism" which lasted till the WW I (beginning 1914).