Answer:
a. 7000 tons
Explanation:
Big Brutus is the world's largest electric shovel. It stands 16 stories high amid the fields of rural southeast Kansas. The coal strip mine it helped clear of rock and dirt has long been shut down, and Brutus has been turned into a museum.
The Bucyrus RH400, now owned by Caterpillar, is said to hold the title of the world's biggest hydraulic excavator. This monster is a front shovel excavator and weighs in at around 980 tonnes. This mine chewer has an undercarriage width of 8.6 meters and crawler length of 10.98 meters.
Big Brutus' bucket could lift 150 tons of coal, and worked at a speed of 0.22 MPH, 24 hours a day,and 7000 tons per hour.
D because it would make it worse since significantly warmer areas are due to human activities
B. specific to a substrate
