Which of the following methods might a grower who had previously used natural light use to reduce both heat levels and light exposure to growing plants? a. open vents
b. switch to HID lighting
c. switch to LED lighting
d. deploy shades

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11