Globalisation and lack of care are more probable reasons.
Raising the temperature will not made a new species materialize magically from the other coin of planet. Commerce can do and will do it. Fruit sector has been also traditionally vulnerable to sabotage. There are several old examples where a disease was introduced deliberately.
About Pongamia trees, they are legumes, so:
1) seeds will be typically toxic without processing. Toxic in a subtle but still dangerous way.
2) will alter the Nitrogen in soil probably (but will be able to grow in poor soils).
3) There is a risk to became invasive, as other legumes like Kudzu proven to be. Specially when planted at scale.
Raising the temperature will not made a new species materialize magically from the other coin of planet. Commerce can do and will do it. Fruit sector has been also traditionally vulnerable to sabotage. There are several old examples where a disease was introduced deliberately.
About Pongamia trees, they are legumes, so:
1) seeds will be typically toxic without processing. Toxic in a subtle but still dangerous way.
2) will alter the Nitrogen in soil probably (but will be able to grow in poor soils).
3) There is a risk to became invasive, as other legumes like Kudzu proven to be. Specially when planted at scale.