He graph shows air pollution in the city of London over time. A graph titled Air Pollution in London has year on the x-axis and particles (micrograms per cubic meter) on the y-axis. At 1700 the value is around 260; 1750, 360; 1800, 390; 1850, 580; 1875, 610; 1915, 380; 1950, 150; 2016, 20.

When did air pollution reach its highest point in London?

around 1825
around 1850
around 1875
around 1900

During andrew johnson’s presidency, the radical republicans gained control over policymaking in congress. they had enough power to override any presidential veto. how did the radical republicans use this opportunity? a. they blocked johnson’s weak reconstruction policies by taking charge of the reconstruction plan. b. they extended their support to johnson’s policies for reconstruction of the south. c. they removed johnson from office and took over the task of reconstructing the south. d. they removed all former confederates from office and stopped the south from rejoining the union.