Very few.
Alaska oil is generally refined in facilities located outside of Alaska, mainly in refineries in the contiguous United States such as in Washington state or California. Transporting the oil to these refineries can be done via pipelines, tankers, or other modes of transportation.
Of course there is. Many oil tankers end up spilling oil for one reason or another. This ruins the environment and kills birds and animals. I suggest you watch the story of the Exxon Valdez accident in Alaska. The damage done from the spill will last for a 100 years. There are no drawbacks to the oil itself but to the transportation of oil. Pipelines can damage the tundra and tanker ships can spill oil into the bay/sea/ocean.
people
Pipelines, Oil tankers (Ships), Oil Drums, Road Tankers.
The Alaskan pipeline goes from the north area of Alaska to the southern area, where the oil is loaded into tankers and taken to West Coast ports. A vast system of domestic pipelines then transport the oil to refineries throughout the US.
both
250
mostly by ship and pipelines
by using air pressure
Coal is solid and oil is a liquid.
Crude oil is transported primarily by two methods: pipelines and tankers.