Are these sentences grammatically correct?
1.An engineer regards the buffalo as "an animal not of the past but of the future" as it has no limitations that we are likely to encounter in case of a tractor.

2.Generally, the life span of a buffalo is more than twenty five years.

3.The type of buffalo found in Southeast Asia produces
a litre a day.
"a litre" of what?
4.No, only two dozens of the islands are inhabited.
or
No, only two dozen of the islands are inhabited.

5.The Straits of Malacca joins the Indian and Pacific Oceans.
or
The Straits of Malacca join the Indian and Pacific Ocean .

6.The match was described as "decisive"
because the winning team would have the chance to play against the top team from the North Zone.

7.Getting drunk caused his neighbour to lie in the puddle by the road.
in a puddle by the road.
8.Abe worked on the farms.
but make sure it is more than one farm = "farms" and not a single farm.
9.The constant work with an axe
made Abe have strong muscles.
"gave Abe strong muscles"
10.He believed in earning a living by hard work.

11.We know that Abe was a keen learner as it is evident from the fact that he used to walk fifty-four kilometres in one day just to hear a lawyer make a speech.
omit "as it is evident"