India has raised concerns at the European Union's decision to classify dye-making chemical anthraquinone as a pesticide, calling it a non-tariff barrier that has hit tea exports to the trade bloc.

The government has asked the EU to share the scientific basis for setting the maximum residue level for imported tea, its sampling and testing methodology, and the international standards on which such assessment is based.

The EU has set a maximum residue limit (MRL) of 0.02 mg per kg for tea. India argued that anthraquinone is a naturally occurring pollutant or a hydrocarbon and not a pesticide, after various tea importers from the EU conducted tests across plantations in India.

"Its strict testing by the EU has affected Indian tea exports to the EU," said a Geneva-based official, who did not wish to be identified.

India exported tea worth $99.5 million to the EU in 2020-21, down from $101.61 million in the previous year.

I'm going to do the following analysis

1. The tea trade history between the EU and India.
2. Why the EU has made such decisions and the motivation behind it, such as protecting human rights and maintain a better environment.
3. The Indian tea industry threats, such as global competitors and its domestic regulation issues.

Right now I got stuck on how to go deeper for above points and how to relate with trade law regulations.

Could you kindly provide me some advice?