Literal question
<svar a="all" v="IT01A050 IT01A051 IT01A052 IT01A053 IT01A054 IT01A055 IT01A056 IT01A057 IT01A058"><span class="em">4.2 Indicate the type of fuel or power that feeds the heating system in the dwelling (more than one answer is possible)</span><br /><div class="i1">[] 1 Methane, natural gas<br />[] 2 Diesel<br />[] 3 Liquid propane gas<br />[] 4 Wood<br />[] 5 Electricity<br />[] 6 Fuel oil<br />[] 7 Coal<br />[] 8 Solar energy<br />[] 9 Other types of fuel or energy</div><br /></svar>