Hindustan Times (Lucknow) - - NATION - Vanita Srivs­tava Vanita.shri­vas­tava@hin­dus­tan­

NEW DELHI: Ex­perts have cau­tioned that global warm­ing and in­creas­ing car­bon diox­ide lev­els in the at­mos­phere can cause pollen lev­els to rise which in tur n can fur­ther ag­gra­vate al­ler­gies. A study con­ducted by re­searchers at Har­vard and the Univer­sity of Mas­sachusetts pub­lished in the jour­nal PLOS ONE on Wed­nes­day in­di­cates that pollen al­ler­gies could in­crease be­cause of global warm­ing.

“One ex­pected ef f ect of cli­mate change on hu­man health is in­creas­ing al­ler­gic and asth­matic symp­toms through changes in pollen bi­ol­ogy. Al­ler­gic dis­eases have a large im­pact on hu­man health glob­ally, with 10–30% of the pop­u­la­tion af­fected by al­ler­gic rhini­tis and more than 300 mil­lion af­fected by asthma. Pollen from grass species, which are highly al­ler­genic and oc­cur world­wide, elic­its al­ler­gic re­sponses in 20% of the gen­eral pop­u­la­tion and 40% of atopic in­di­vid­u­als,” the study notes.

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