Eco-Burial and Jewish Law

Is it right to use arable land --often very expensive in populated areas -- for graves, then pollute the environment by keeping them "dignified" through maintenance and pesticides, with the hollow promise of "perpetual care," and say this is all required by Jewish Law, when Jewish Law itself is the source of the requirement for eco-decomposition and of prohibitions against costly burial?  I explicate the sources using the Conservative Movement's oficial responsum, "Alternative Kevura Methods" by Rabbi Jeremy Kalmanofsky, which can be found at bit.ly/3tMa4RG