[2][3] In 2013, he argued that Serbia would "lose 500 million euros a year through purchase of genetically modified seeds" and urged that country to remain a GMO-free zone.

[4] The following year, he noted that genetically modified soy products were being planted in different parts of Serbia as the result of smuggling and urged the government to bring criminal charges against the offenders.

[7] He is an opponent of Serbia's plans to permit the sale of agricultural lands to international buyers as a condition of joining the European Union (EU).

In 2020, he conducted a one-day hunger strike on the steps of the national assembly to protest the Serbian government's call for Serbs in Kosovo to participate in disputed entity's governmental institutions.

[15] Ševarlić received the sixth position on the combined Healthy Serbia–Better Serbia electoral list in the 2020 Serbian parliamentary election as a non-party candidate.