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my ($environment, $duration, $config) = @{$EnvsToRun->{data}};

my ($environment, $duration, $config) = @{$EnvsToRun->{data}->[0]};

for my $CurrentEnv (@{$EnvsToRun->{data}}) {
    my ($environment, $duration, $config) = @$CurrentEnv;
    ...
}

$EnvsToRun->{data} = [$environment, $duration, $config];
... later ...
($environment, $duration, $config) = @{$EnvsToRun->{data}};