But other farmers feared the deal would slow future innovations.

In Kabul, activist Zahra Husseini said she feared the deal could worsen the situation for women in Afghanistan.

PwC also feared the deal "may be considerably undervalued" after discovering a "number of areas of concern for the AFC".

Bob Fulkerson with Progressive Leadership Alliance of Nevada said he feared the deal could open the floodgates for other companies seeking similar tax breaks.