With reference to environmental air pollution, which among the following statements is/are correct regarding emissions from vehicles?
1. With respect to petrol cars with a catalyst, Diesel cars have higher emissions of NOx.
2. High sulphur content emitted by Diesel cars may lead to acid rain.
Select the correct answer using the codes given below:
1
1 only
2
2 only
3
Both 1 and 2
4
Neither 1 nor 2